projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 7b718769 NS |
2 | * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. | |
| 1da177e4 | 4 | * |
| 7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as | |
| 1da177e4 LT |
7 | * published by the Free Software Foundation. |
| 8 | * | |
| 7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 1da177e4 | 13 | * |
| 7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, | |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 1da177e4 LT |
17 | */ |
| 18 | #ifndef __XFS_ALLOC_BTREE_H__ | |
| 19 | #define __XFS_ALLOC_BTREE_H__ | |
| 20 | ||
| 21 | /* | |
| 22 | * Freespace on-disk structures | |
| 23 | */ | |
| 24 | ||
| 25 | struct xfs_buf; | |
| 26 | struct xfs_btree_cur; | |
| 1da177e4 LT |
27 | struct xfs_mount; |
| 28 | ||
| 7cc95a82 CH |
29 | /* |
| 30 | * Btree block header size depends on a superblock flag. | |
| 7cc95a82 | 31 | */ |
| ee1a47ab CH |
32 | #define XFS_ALLOC_BLOCK_LEN(mp) \ |
| 33 | (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ | |
| 34 | XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) | |
| 7cc95a82 | 35 | |
| 1da177e4 LT |
36 | /* |
| 37 | * Record, key, and pointer address macros for btree blocks. | |
| 136341b4 CH |
38 | * |
| 39 | * (note that some of these may appear unused, but they are used in userspace) | |
| 1da177e4 | 40 | */ |
| 136341b4 CH |
41 | #define XFS_ALLOC_REC_ADDR(mp, block, index) \ |
| 42 | ((xfs_alloc_rec_t *) \ | |
| 43 | ((char *)(block) + \ | |
| 7cc95a82 | 44 | XFS_ALLOC_BLOCK_LEN(mp) + \ |
| 136341b4 | 45 | (((index) - 1) * sizeof(xfs_alloc_rec_t)))) |
| 1da177e4 | 46 | |
| 136341b4 CH |
47 | #define XFS_ALLOC_KEY_ADDR(mp, block, index) \ |
| 48 | ((xfs_alloc_key_t *) \ | |
| 49 | ((char *)(block) + \ | |
| 7cc95a82 | 50 | XFS_ALLOC_BLOCK_LEN(mp) + \ |
| 136341b4 | 51 | ((index) - 1) * sizeof(xfs_alloc_key_t))) |
| 1da177e4 | 52 | |
| 136341b4 CH |
53 | #define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \ |
| 54 | ((xfs_alloc_ptr_t *) \ | |
| 55 | ((char *)(block) + \ | |
| 7cc95a82 | 56 | XFS_ALLOC_BLOCK_LEN(mp) + \ |
| 136341b4 CH |
57 | (maxrecs) * sizeof(xfs_alloc_key_t) + \ |
| 58 | ((index) - 1) * sizeof(xfs_alloc_ptr_t))) | |
| 561f7d17 CH |
59 | |
| 60 | extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, | |
| 61 | struct xfs_trans *, struct xfs_buf *, | |
| 62 | xfs_agnumber_t, xfs_btnum_t); | |
| 60197e8d | 63 | extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); |
| 561f7d17 | 64 | |
| 1da177e4 | 65 | #endif /* __XFS_ALLOC_BTREE_H__ */ |